"I've learned I've got to take care of my health. This is about health. ... It's about my lifestyle," the Wilson Phillips singer said on Tuesday's Today show. "I'm laying the groundwork for myself, for my future."

Wilson, who lost 150 pounds via gastric bypass in August 1999, underwent lap-band surgery in January after gaining back two-thirds of the weight and learning last year that she was borderline diabetic. In the procedure, a silicone gastric band is placed around the top portion of the stomach to treat obesity by reducing the amount of food consumed. Since undergoing the surgery, Wilson cut sugar and flour out of her diet and has lost more than 30 pounds.

"I was at the point where I did need intervention. I'm 44 this month. I needed to take action. I needed to help myself again," she said. "What I feel now — I feel the sensation of being full quickly, which I was not feeling."

But the singer wants to make it clear that surgery is not the be-all, end-all to weight struggles. "The message isn't go out and get a surgery today," she said. "The most important thing I think we need to remember is that we're a work in progress. Do not be ashamed or afraid to ask for help. That's what I did. I asked for help."

Wilson's weight battle and lap-band surgery will be documented on TV Guide Network's reality show, Wilson Phillips: Still Holding On. In the premiere, she reveals to her fellow bandmates, her sister Wendy Wilson and Chynna Phillips, that she's decided to undergo the lap-band surgery four weeks before their comeback tour is scheduled to kick off. (The trio's new album, Dedicated, hit stores Tuesday.)

Wilson Phillips: Still Holding On premieres Sunday at 9/8c on TV Guide Network.